EP2775493A1

EP2775493A1 - Electromagnetic relay and method for manufacturing the same

Info

Publication number: EP2775493A1
Application number: EP14151054.5A
Authority: EP
Inventors: Yoshiaki Mimura; Hironori Sanada; Hideto Yamauchi
Original assignee: Omron Corp; Omron Tateisi Electronics Co
Current assignee: Omron Corp
Priority date: 2013-03-08
Filing date: 2014-01-14
Publication date: 2014-09-10
Anticipated expiration: 2034-01-14
Also published as: JP2014175172A; CN203895374U; US9406469B2; CN104037023A; CN104037023B; US20140253267A1; JP6115198B2; EP2775493B1

Abstract

This invention provides an electromagnetic relay capable of easily adjusting operation characteristics and having high productivity and good yield. The electromagnetic relay is one in which a movable touch piece is rotated by a movable iron piece configured to rotate based on magnetization and demagnetization of an electromagnet block, to make a movable contact that is provided on the movable touch piece come into contact with and separate from a fixed contact opposed to the movable contact. In particular, operation characteristics are made adjustable by means of a press-fitting amount at the time of press-fitting each of normally open / normally closed fixed contact terminals provided with normally open / normally closed fixed contacts into a spool of the electromagnet block along a moving direction of the movable contact.

Description

BACKGROUND OF THE INVENTION

1. TECHNICAL FIELD

The present invention relates to an electromagnetic relay, and especially to an electromagnetic relay capable of performing operation characteristics adjusting work for a fixed contact terminal.

2. RELATED ART

As a conventional electromagnetic relay, for example, there is an electromagnetic relay like one shown in Fig. 1 of Japanese Unexamined Patent Publication No. (Translation of PCT Application) No. 2001-521273 , in which a core 16 is inserted from the lateral side through a coil tube 11 of a coil body 1 having first and second flanges 12, 13 at both ends thereof, while first and second fixed contact supports 3, 4 are assembled on the first flange 12 side from above. In the foregoing electromagnetic relay, a contact spring 23 rotates via an armature 22 that is adsorbed to and separated from the core 16, to open and close contacts.

SUMMARY

However, in the foregoing electromagnetic relay, it is necessary to plastically deform the upper ends of the first and second fixed contact supports 3, 4, for adjustment of operation characteristics which is performed in order to eliminate dispersion of component accuracy and assembly accuracy. This makes it troublesome to adjust the operation characteristics, causing a problem of low product yield as well as low productivity.
In view of the above problem, an object of the present invention is to provide an electromagnetic relay, capable of easily adjusting operation characteristics and having high productivity and good yield, and a method for manufacturing the same.
In order to solve the above problem, an electromagnetic relay according to the present invention is an electromagnetic relay in which a movable touch piece is rotated by a movable iron piece configured to rotate based on magnetization and demagnetization of an electromagnet block, to make a movable contact that is provided on the movable touch piece come into contact with and separate from a fixed contact opposed to the movable contact. The electromagnetic relay has a configuration where operation characteristics are made adjustable by means of a press-fitting amount at the time of press-fitting a fixed contact terminal provided with the fixed contact into a spool of the electromagnet block along a moving direction of the movable contact.
According to the present invention, assembly work and operation characteristics adjusting work for the fixed contact terminal can be carried out by performing the same work, and hence it is possible to obtain an electromagnetic relay with high productivity and good yield. It is to be noted that the press-fitting amount means a pressing distance in the press-fitting.
As an embodiment of the present invention, a configuration may be formed where the operation characteristics are made adjustable by means of a press-fitting amount at the time of press-fitting the fixed contact terminal, provided with the fixed contact located on the opposite side to the electromagnet block with respect to the movable contact, into the spool of the electromagnet block along the moving direction of the movable contact.
According to the present embodiment, the assembly work and the operation characteristics adjusting work for the fixed contact terminal can be carried out by performing the same work by press-fitting the fixed contact terminal, located on the opposite side to the electromagnet block, into the spool of the electromagnet block, and hence it is possible to obtain an electromagnetic relay with high productivity and good yield.
As another embodiment of the present invention, a configuration may be formed where the operation characteristics are made adjustable by means of a press-fitting amount at the time of press-fitting the fixed contact terminal, provided with the fixed contact located on the opposite side to the electromagnet block out of a pair of fixed contacts opposed to each other with the movable contact provided therebetween, into the spool of the electromagnet block along the moving direction of the movable contact.
According to the present embodiment, the assembly work and the operation characteristics adjusting work for the fixed contact terminal can be carried out by performing the same work by press-fitting the fixed contact terminal into the spool of the electromagnet block, and hence it is possible to obtain an electromagnetic relay with high productivity and good yield.
Further, as another embodiment of the present invention, a configuration may be formed where the operation characteristics are made adjustable, while alignment is made, by taking as a normally closed fixed contact the fixed contact located on the opposite side to the electromagnet block out of the pair of fixed contacts opposed to each other with the movable contact provided therebetween, and press-fitting a normally closed fixed contact terminal provided with the normally closed fixed contact into the spool of the electromagnet block along the moving direction of the movable contact.
According to the present embodiment, assembly work and operation characteristics adjusting work for the normally closed fixed contact terminal can be carried out by performing the same work by press-fitting the normally closed fixed contact terminal into the spool of the electromagnet block, and hence it is possible to obtain an electromagnetic relay with high productivity and good yield.
As an embodiment of the present invention, a configuration may be formed where the operation characteristics are made adjustable by means of a press-fitting amount at the time of press-fitting the fixed contact terminal, provided with the fixed contact located on the electromagnet block side with respect to the movable contact, into the spool of the electromagnet block along the moving direction of the movable contact.
According to the present embodiment, the assembly work and the operation characteristics adjusting work for the fixed contact terminal can be carried out by performing the same work by press-fitting the fixed contact terminal into the spool of the electromagnet block, and hence it is possible to obtain an electromagnetic relay with high productivity and good yield.
Moreover, as another embodiment of the present invention, a configuration may be formed where the operation characteristics are made adjustable, while alignment is made, by taking as a normally closed fixed contact the fixed contact located on the opposite side to the electromagnet block out of the pair of fixed contacts opposed to each other with the movable contact provided therebetween, and press-fitting a normally closed fixed contact terminal provided with the normally closed fixed contact into the spool of the electromagnet block along the moving direction of the movable contact.
According to the present embodiment, assembly work and operation characteristics adjusting work for the normally closed fixed contact terminal can be carried out by performing the same work by press-fitting the normally closed fixed contact terminal into the spool of the electromagnet block, and hence it is possible to obtain an electromagnetic relay with high productivity and good yield.
Furthermore, as another embodiment of the present invention, a configuration may be formed where the operation characteristics are made adjustable, while alignment is made, by taking as a normally open fixed contact the fixed contact located on the electromagnet block side out of the pair of fixed contacts opposed to each other with the movable contact provided therebetween, and press-fitting a normally open fixed contact terminal provided with the normally closed fixed contact into the spool of the electromagnet block along the moving direction of the movable contact.
According to the present embodiment, assembly work and operation characteristics adjusting work for the normally open fixed contact terminal can be carried out by performing the same work by press-fitting the normally open fixed contact terminal into the spool of the electromagnet block, and hence it is possible to obtain an electromagnetic relay with high productivity and good yield.
As another embodiment of the present invention, the fixed contact terminal may be arranged with the fixed contact between a pair of press-fitting portions that extend in parallel so as to be press-fitted into the spool of the electromagnet block.
According to the present embodiment, with the fixed contact accurately and firmly supported by the pair of press-fitting portions, it is possible to obtain an electromagnetic relay with high alignment accuracy and no dispersion of operation characteristics.
As a different embodiment of the present invention, the press-fitting portions may be respectively cut from corners formed by bending both-side edges of the fixed contact terminal in the same direction.
According to the present embodiment, the press-fitting portions may be cut from the corners formed by bending both-side edges of the fixed contact terminal. For this reason, not only the material yield is good, but also the fixed contact terminal has high rigidity and resists elastic deformation, and hence it is possible to obtain an electromagnetic relay having high supporting strength and alignment accuracy and no dispersion of operation characteristics.
In order to solve the above problem, a method for manufacturing an electromagnetic relay according to the present invention is a method for manufacturing an electromagnetic relay in which a movable touch piece is rotated by a movable iron piece configured to rotate based on magnetization and demagnetization of an electromagnet block, to make a movable contact that is provided on the movable touch piece come into contact with and separate from a fixed contact opposed to the movable contact. This method has a step where operation characteristics are adjusted by means of a press-fitting amount at the time of press-fitting a fixed contact terminal provided with the fixed contact into a spool of the electromagnet block along a moving direction of the movable contact.
According to the present invention, the assembly work and the operation characteristics adjusting work for the fixed contact terminal can be carried out by performing the same work by press-fitting the fixed contact terminal into the spool of the electromagnet block, and hence it is possible to obtain a method for manufacturing an electromagnetic relay with high productivity and good yield.
As an embodiment according to the present invention, there may be performed a step where the operation characteristics are adjusted by means of a press-fitting amount at the time of press-fitting the fixed contact terminal, provided with the fixed contact located on the opposite side to the electromagnet block with respect to the movable contact, into the spool of the electromagnet block along the moving direction of the movable contact.
Further, as another embodiment according to the present invention, there may be performed a step where the operation characteristics are adjusted by means of a press-fitting amount at the time of press-fitting the fixed contact terminal, provided with the fixed contact located on the electromagnet block side with respect to the movable contact, into the spool of the electromagnet block along the moving direction of the movable contact.
According to the present embodiment, the assembly work and the operation characteristics adjusting work for the fixed contact terminal can be carried out by performing the same work by press-fitting the fixed contact terminal into the spool of the electromagnet block, thus exerting the effect of being able to obtain a method for manufacturing an electromagnetic relay with high productivity and good yield.

BRIEF DESCRIPTION OF THE DRAWINGS

Figs. 1A and 1B are respectively a perspective view and a perspective view seen from a different angle, showing a first embodiment of an electromagnetic relay according to the present invention;
Fig. 2 is an exploded perspective view of the electromagnetic relay shown in Fig. 1A;
Fig. 3 is an exploded perspective view of the electromagnetic relay shown in Fig. 1B;
Figs. 4A and 4B are respectively a longitudinal sectional view and a partial lateral sectional view of the electromagnetic relay shown in Fig. 1;
Figs. 5A and 5B are longitudinal sectional views showing an assembled state of a casing shown in Fig. 1;
Fig. 6A and 6B are longitudinal sectional views showing states before and after operation of the electromagnetic relay shown in Fig. 1;
Figs. 7A and 7B are respectively a perspective view, and a perspective view seen from a different angle, of a base shown in Figs. 2 and 3;
Figs. 8A and 8B are respectively a perspective view, and a perspective view seen from a different angle, of a spool shown in Figs. 2 and 3;
Fig. 9 is a perspective view of a normally open fixed contact terminal and a normally closed fixed contact terminal shown in Figs. 2 and 3; and
Figs. 10A and 10B are respectively a bottom view and a longitudinal sectional perspective view of the casing shown in Figs. 2 and 3.

DETAILED DESCRIPTION

Embodiments of an electromagnetic relay according to the present invention will be described in accordance with the accompanying drawing of Figs. 1 to 10. As shown in Fig. 2, an electromagnetic relay according to the present embodiment is configured of a base 10, a pair of electromagnet blocks 20 juxtaposed on the base 10, a contact mechanism portion 40 assembled into the base 10 and the electromagnet block 20, and a casing 60.
As shown in Fig. 7A, on the base 10, a pair of aligning recessed portions 12, 12 is formed while a partition portion 11 projectingly provided in a central portion on the upper surface is placed therebetween. Further, at one-side edge out of mutually opposed both-side edges of the base 10, a pair of notches 13, 13 to be fitted with a seal-retaining rib 23b of a spool 21, which will be described later, are juxtaposed. Moreover, at the other-side edge of the base 10, notches 14, 15 are alternately juxtaposed, the notches being to be fitted with a terminal portion 53 of a normally open fixed contact terminal 50 and a terminal portion 58 of a normally closed fixed contact terminal 55 which will be described later. Furthermore, as shown in Fig. 7B, a continuous taper surface 16 is formed along an outer periphery of the rear surface of the base 10.
As shown in Fig. 2, the electromagnet block 20 is formed such that a coil 30 is wound around a body 22 of a spool 21 while an iron core 31 having a substantially T-shape in section is inserted through a through hole 22a of the body 22, and the projecting one end is made a magnetic pole portion 32 while the projecting other end 33 is caulked and fixed to a vertical portion 35 of a substantially L-shaped yoke 34. A seal-retaining projected portion 35a is projectingly provided on the outward surface of the vertical portion 35, and from the lower edge thereof, a movable contact terminal portion 36 provided with a chamfered portion 36a (Figs. 4, 5) extends to the lower side.
In particular, as shown in Fig. 8, the spool 21 has guard portions 23, 24 on both sides of the body 22, and a recessed portion 23a to be fitted with the yoke 34 is formed on the outward surface of the one guard portion 23, from the lower edge of which the seal-retaining rib 23b extends (Fig. 8B). Further, a press-fitting groove 23c where a coil terminal 37 can be press-fitted is provided on the side end surface of the guard portion 23 (Fig. 4A). Moreover, as shown in Fig. 8A, press-fitting holes 24a, 24b are provided in upper and lower parts at each-side edge of the outward surface of the other guard portion 24 in the spool 21. Furthermore, a seal-retaining rib 24c extends to the lateral side from a position adjacent to the press-fitting hole 24a at a side edge in the guard portion 24. Then, engaging receiving portions 23d, 24d are respectively provided at upper corners of the opposed surfaces of the guard portions 23, 24.
As shown in Fig. 2, the contact mechanism portion 40 is configured of a movable touch piece 41, the normally open fixed contact terminal 50 and the normally closed fixed contact terminal 55.
The movable touch piece 41 is made up of a conductive plate spring flexed in a substantially L-shape. One end thereof is provided with a movable contact 42, while a vertical portion thereof is caulked and fixed to a movable iron piece 43. Then, the other end of the movable touch piece 41 is caulked and fixed to a horizontal portion of the yoke 34, thereby to rotatably support the movable iron piece 43 and the movable touch piece 41 around the leading edge of the horizontal portion of the yoke 34 as a fulcrum.
In the normally open fixed contact terminal 50, as shown in Fig. 9, both-side edges located on both sides to a normally open fixed contact 51 having been caulked and fixed are flexed in parallel into a substantially C-shape in plain, and a press-fitting portion 52 is cut from the corner thereof, while a terminal portion 53 extends from the edge of one side thereof to the lower side. Press-fitting receiving portions 52a to come into press-contact with the press-fitting holes 24a of the spool 21 are provided in upper and lower parts in the press-fitting portion 52, while a push-out preventive rib 52b for preventing push-out of chips from the press-fitting hole 24a is provided on a base of the press-fitting receiving portion 52a. Further, a taper surface 52c for facilitating a press-fitting operation is formed on each side surface of the press-fitting portion 52.
In the normally closed fixed contact terminal 55, a pair of press-fitting portions 57 extends in parallel in a horizontal direction from the upper corners located to both sides of the normally closed fixed contact 56 having been caulked and fixed, and from the corner of the lower edge thereof, the terminal portion 58 extends to the lower side. Press-fitting receiving portions 57a to come into press-contact with the press-fitting holes 24b of the spool 21 are provided in upper and lower parts in the press-fitting portion 57, while a push-out preventive rib 57b for preventing push-out of chips from the press-fitting hole 24b is provided on a base of the press-fitting receiving portion 57a. Further, a taper surface 57c for facilitating a press-fitting operation is formed on each side surface of the press-fitting portion 57.
As shown in Fig. 2, the casing 60 has a box shape fittable to the base 10 where the electromagnet block 20 and the contact mechanism portion 40 are assembled, and a corner portion of the upper surface thereof has a gas vent hole 61. Further, as shown in Fig. 10, an insulating rib 62 is projectingly provided in a central portion on each of the opposed inner side surfaces of the casing 60, while a position-regulating projected portion 63 is provided on the base of the insulating rib 62. Moreover, position-regulating projected threads 64 as position-regulating projected portions are projectingly provided respectively at the opposed edges of the ceiling surface of the casing 60.
Next, a procedure for assembling the foregoing constitutional components will be described.
First, the coil 30 is wound around the body 22 of the spool 21, while a leader line thereof is bound to a binding portion 38 of the coil terminal 37 press-fitted into the press-fitting groove 23c of the guard portion 23 and soldered, and thereafter the binding portion 38 is bent inward. Then, the iron core 31 is inserted through the through hole 22a provided in the body 22 of the spool 21, and the projecting other end is caulked and fixed to the vertical portion 35 of the yoke 34, to complete the electromagnet block 20. Subsequently, the other end of the movable touch piece 41 caulked and fixed with the movable iron piece 43 is caulked and fixed to the horizontal portion of the yoke 34. Further, the press-fitting portion 52 of the normally open fixed contact terminal 50 is press-fitted into the press-fitting hole 24a, provided at the edge of the outward surface of the guard portion 24 of the electromagnet block 20, along the shaft center of the iron core 31, to contactably and separably arrange the movable contact 42 on the normally open fixed contact 51. At this time, a contact distance between the normally open fixed contact 51 of the normally open fixed contact terminal 50 and the movable contact 42 can be adjusted by means of a press-fitting amount of the press-fitting portion 52, thereby to allow adjustment of the operation characteristics such as an operating voltage and a restoration voltage.
Subsequently, the electromagnet blocks 20, 20 are respectively aligned in the pair of aligning recessed portions 12, 12 of the base 10 such that the shaft center of the iron core 31 is in parallel with the upper surface of the base 10. Then, the seal-retaining rib 23b of the spool 21 is fitted to the notch 13 of the base 10 while the terminal portions 53, 58 of the normally open fixed contact terminal 50 and the normally closed fixed contact terminal 55 are fitted to the notches 14, 15 (Figs. 1, 4).
Moreover, the press-fitting portion 57 of the normally closed fixed contact terminal 55 is press-fitted into the press-fitting hole 24b of the guard portion 24 along the shaft center of the iron core 31. A contact distance between the normally closed fixed contact 56 of the normally closed fixed contact terminal 55 and the movable contact 42 can be adjusted by means of a press-fitting amount of the press-fitting portion 57 at this time, thereby to allow adjustment of the operation characteristics such as an operating voltage and a restoration voltage.
According to the present embodiment, the operation characteristics can be accurately adjusted while the press-fitting portion 57 of the normally closed fixed contact terminal 55 is press-fitted into the press-fitting hole 24b of the spool 21, thereby to facilitate an assembly operation and an adjustment operation, leading to improvement in productivity and yield. For this reason, internal constitutional components are not required to have high dimensional accuracy, thereby to facilitate manufacturing of the internal constitutional components. It is to be noted that the internal constitutional components refer to components constituting the electromagnet block, such as the coil wound around the spool, the iron core and the yoke, and components constituting the contact mechanism portion such as the movable touch piece and the fixed touch piece.
Further, since the press-fitting portions 52, 57 can be press-fitted into the press-fitting holes 24a, 24b arranged in upper and lower parts along each-side edge of the guard portion 24, it is possible to save spaces to install the normally open fixed contact terminal 50 and the normally closed fixed contact terminal 55, so as to obtain an electromagnetic relay with a small floor area, especially a small lateral width.
It is to be noted that, although the configuration has been formed in the present embodiment where the contacts are arranged in the order of the normally open fixed contact 51, the movable contact 42 and the normally closed fixed contact 56 from the side close to the electromagnet block 20 (cf. Fig. 6), the order of the normally open fixed contact and the normally closed fixed contact can be changed, or either one fixed contact may be omitted.
Then, by fitting the casing 60 to the base 10, the pair of electromagnet blocks 20, 20 is partitioned by the insulating rib 62 (Fig. 4B), the position-regulating projected portion 63 and the position-regulating projected thread 64, provided in the casing 60, are fitted to the engaging receiving portions 23d, 24d of the guard portions 23, 24, to regulate the positions (Fig. 5).
According to the present embodiment, it is possible to accurately align the electromagnet blocks 20, 20 in predetermined positions on the base 10, so as to obtain an electromagnetic relay with little dispersion of operation characteristics.
Further, according to the present embodiment, as shown in Fig. 5B, the engaging receiving portions 23d, 24d are left-right asymmetric, which is a structure capable of preventing wrong assembly.
It is to be noted that, although the case has been described in the present embodiment where a total of four engaging receiving portions 23d, 24d are provided in the guard portions 23, 24, at least one engaging receiving portion may be provided, and two or three may be provided. Especially in the case of providing two engaging receiving portions, it is preferable to arrange those on a diagonal line.
Finally, a sealing member is injected and solidified to be sealed via the taper surface 16 provided along the peripheral edge of the bottom surface of the base 10 shown in Fig. 1B.
According to the present embodiment, a space between the base 10 and the casing 60 is blocked by the seal-retaining ribs 23b, 24c provided in the guard portions 23, 24. Further, the seal-retaining projected portion 35a provided on the outward surface of the yoke 34 is in contact with the inner side surface of the casing 60. Hence it is possible to prevent the sealing member from getting into the casing 60, and prevent the sealing member from adhering to the internal constitutional component such as the movable touch piece 41.
Next, the operation of the electromagnetic relay according to the present embodiment will be described.
That is, as shown in Fig. 6A, prior to application of a voltage to the coil 30 of the electromagnet block 20, the movable contact 42 is in contact with the normally closed fixed contact 56 due to spring force of the movable touch piece 41.
Then, by applying a voltage to the coil 30 to magnetize it, the movable iron piece 43 is sucked to the magnetic pole portion 32 of the iron core 31 to rotate against the spring force of the movable touch piece 41. Therefore, after the contacts are opened as the movable contact 42 is separated from the normally closed fixed contact 56 and it then comes into contact with the normally open fixed contact 51, the movable iron piece 43 is adsorbed to the magnetic pole portion 32 of the iron core 31 (Fig. 6B).
Subsequently, when the magnetization of the coil 30 is released (demagnetization), the contacts are opened as the movable contact 42 is separated from the normally open fixed contact 51 due to the spring force of the movable touch piece 41, and the movable iron piece 43 rotates in a reverse direction while the movable contact 42 comes into contact with the normally closed fixed contact 56, to restore the original state.
Although the electromagnetic relay including the normally open fixed contact terminal and the normally closed fixed contact terminal has been described in the foregoing embodiment, it may be applied to an electromagnetic relay having either one of the normally open fixed contact terminal and the normally closed fixed contact terminal.
Further, it may not be restricted to the case of providing a pair of electromagnet blocks, but may be applied to the case of providing one electromagnet block.
Moreover, it may naturally be applied to an electromagnetic relay where the shaft center of the electromagnet block is arranged so as to be orthogonal to the upper surface of the base.

Claims

An electromagnetic relay in which a movable touch piece is rotated by a movable iron piece configured to rotate based on magnetization and demagnetization of an electromagnet block, to make a movable contact that is provided on the movable touch piece come into contact with and separate from a fixed contact opposed to the movable contact,
wherein operation characteristics are made adjustable by means of a press-fitting amount at the time of press-fitting a fixed contact terminal provided with the fixed contact into a spool of the electromagnet block along a moving direction of the movable contact.
The electromagnetic relay according to claim 1, wherein the operation characteristics are made adjustable by means of a press-fitting amount at the time of press-fitting the fixed contact terminal, provided with the fixed contact located on the opposite side to the electromagnet block with respect to the movable contact, into the spool of the electromagnet block along the moving direction of the movable contact.
The electromagnetic relay according to claim 2, wherein the operation characteristics are made adjustable by means of a press-fitting amount at the time of press-fitting the fixed contact terminal, provided with the fixed contact located on the opposite side to the electromagnet block out of a pair of fixed contacts opposed to each other with the movable contact provided therebetween, into the spool of the electromagnet block along the moving direction of the movable contact.
An assembly structure of an electromagnetic relay according to claim 3, wherein the operation characteristics are made adjustable, while alignment is made, by
taking as a normally closed fixed contact the fixed contact located on the opposite side to the electromagnet block out of the pair of fixed contacts opposed to each other with the movable contact provided therebetween, and
press-fitting a normally closed fixed contact terminal provided with the normally closed fixed contact into the spool of the electromagnet block along the moving direction of the movable contact.
The electromagnetic relay according to claim 1, wherein the operation characteristics are made adjustable by means of a press-fitting amount at the time of press-fitting the fixed contact terminal, provided with the fixed contact located on the electromagnet block side with respect to the movable contact, into the spool of the electromagnet block along the moving direction of the movable contact.
The electromagnetic relay according to claim 5, wherein the operation characteristics are made adjustable, while alignment is made, by
taking as a normally closed fixed contact the fixed contact located on the opposite side to the electromagnet block out of the pair of fixed contacts opposed to each other with the movable contact provided therebetween, and
press-fitting a normally closed fixed contact terminal provided with the normally closed fixed contact into the spool of the electromagnet block along the moving direction of the movable contact.
The electromagnetic relay according to claim 6, wherein the operation characteristics are made adjustable, while alignment is made, by
taking as a normally open fixed contact the fixed contact located on the electromagnet block side out of the pair of fixed contacts opposed to each other with the movable contact provided therebetween, and
press-fitting a normally open fixed contact terminal provided with the normally closed fixed contact into the spool of the electromagnet block along the moving direction of the movable contact.
The electromagnetic relay according to any one of claims 1 to 7, wherein the fixed contact terminal is arranged with the fixed contact between a pair of press-fitting portions that extend in parallel so as to be press-fitted into the spool of the electromagnet block.
The electromagnetic relay according to claim 8, wherein the press-fitting portions are respectively cut from corners formed by bending both-side edges of the fixed contact terminal in the same direction.
A method for manufacturing an electromagnetic relay in which
a movable touch piece is rotated by a movable iron piece configured to rotate based on magnetization and demagnetization of an electromagnet block, to make a movable contact that is provided on the movable touch piece come into contact with and separate from a fixed contact opposed to the movable contact,
wherein operation characteristics are adjusted by means of a press-fitting amount at the time of press-fitting a fixed contact terminal provided with the fixed contact into a spool of the electromagnet block along a moving direction of the movable contact.
The method for manufacturing an electromagnetic relay according to claim 10, wherein the operation characteristics are adjusted by means of a press-fitting amount at the time of press-fitting the fixed contact terminal, provided with the fixed contact located on the opposite side to the electromagnet block with respect to the movable contact, into the spool of the electromagnet block along the moving direction of the movable contact.
The method for manufacturing an electromagnetic relay according to claim 10, wherein the operation characteristics are adjusted by means of a press-fitting amount at the time of press-fitting the fixed contact terminal, provided with the fixed contact located on the electromagnet block side with respect to the movable contact, into the spool of the electromagnet block along the moving direction of the movable contact.